Why Didn't Siri Port Release For iPhone 4 Till Now ?

Well before yesterday we reported you that Siri the smart feature over iPhone 4S is available now with it's GUI files on old idevices (iPhone 4, 3GS, iPod touch 4G and 3G) but Siri wasn't ready for use until connecting to Apple server and we showed you two videos for iPhone 4 and iPod touch 4G successfully connected to Apple server and Siri successfully worked but we still asking a question ( Why developers didn't release Siri Port till now ? ) That's what @Chpwn is going to explain it below

@Chpwn posted an article in his blog explaining why they haven't release Siri port for iPhone 4 and iPod Touch 4G, there is two problems, Apple’s IPSWs are encrypted, and hackers do not currently have the decryption keys required to pull out all of the necessary Siri goodness. Also the second problem that it is because of the copyright.

“..the firmware files are distributed encrypted, and we do not yet have the decryption key to access the Siri files inside of the iPhone 4S firmware file.
Just from that, you currently must already own an iPhone 4S to install Siri on it without a blatant copyright violation. But even that’s not all: if you do all of that, there’s still a few more reasons why Siri won’t just work.”

So hackers are facing the decryption keys are found for Apple’s IPSW files, Siri won't be made available to the public. Finally @Chpwn answers users who ask this popular question: nobody has tried it on an iPhone 3GS or iPod touch 3G or an iPad on iOS 5, so we don’t have any clue if it will work or not there. But we can hope it will.